Grinding wheel dresser



June 13, 1944. H. W, KROPF .mL 2,351,269

GRINDING WHEEL DRESSER Filed sept. 2a, 1942 l 2 sheets-shee-1-.2-

rwenora pf. and ckner W. Kro Arhur J.Br` s B5 Wa f Hem' Patented June 13, 1944 p i 2,351,269 GRINDING WHEEL DnEssEn Henry W., 'K1-opi and Arthur J. 'Bricknen v MuskegonHeiglits, Mich., assignors to Brick-ff ner-Krom Machine Company, Muskegon v v Il eights, Mich., a corporation of Michigan Application September 28, 1942, Serial No. 459,930. (Cl. 125-11) 1 Claim.

This invention relates. tofafgrinding. wheel dresser and'it is Yparticularly an improvement upon the device shown inthe patent to' Henry W. Kropf',No. 2,137,690, issuedfNovember 22, 1938.

The' object of the presentv invention is to` provide a mechanism adaptedfto `facilitate the use in conformity both t' the `desired shape of thel article operateduponfand in the correct position laterally of the movement of the table of the grinding machine.

The device embodies various novel features of construction and arrangement as hereinafter more fully described and particularly pointed out in the claims, reference being had to the accompanying drawings, in which,

Fig. 1 is an elevation of a portion of a grinding machine illustrating the grinding wheel, the Work table and the grinding wheel dresser applied thereto.

Fig. 2 is a plan view of parts shown in Fig. l.

Fig. 3 is a cross section on the line 3 3 of Fig. 1.

Fig. 4 is a cross section on the line 4-4 of Fig. 1.

Fig. 5 is an enlarged front view of the templet clamping and adjusting mechanism of the grinding wheel dresser.

Fig. 6 is a sectional elevation on the line 6 6 of Fig. 5.

Fig, 7 is a sectional elevation on the line l--l of Fig. 5, and

Fig. 8 is a plan view of the parts shown in Fig. 5.

Like numbers refer to like gures in the drawings.

I represents the frame of the grinding machine having horizontal tracks 2 on which the work table 3 is mounted for horizontal reciprocation. Suitable and conventional means are provided for reciprocating the work table 3 but such operating means form no part of the present invention and are not shown.

A vertical head 4 extends upwardly from the rear part of the frame I and is provided with a conventional spindle supporting member 5 mounted for vertical adjustment on the front side oi the head 4. The grinding Wheel 6 is mounted on the spindle 'I and is rotated by con- CJD ventional'means 4not 's-hownfand formingno pari; of the present invention;l i..

. For productionA work inw'liichfmanyfarticles ofthe same shape and sizev are tofbe successively operated upon, avjig is 'rigidly attached 'tothe' reciprocating table 3 asbyv a bolt A9 havingits head in a`T-slot I0 in said table. Stops II are provided on the jig 8 Vagainst which "the work` I2 is located to insure proper lateral positioning and clamps I3 rhold the work"rigidly--in place on the jigduring the grinding' operation.

The bed I5 of the grindingfwh'eelidresser is rigidly attached-'to the 'reciprocatingtable3f`as by b0lts` I6 having their heads iii'theT-'slot fill in the table 3." When.4l the bedl |5-i's fatta-shed tol the table 3 it is immovable laterally and cannot be adjusted relative to the position of the work holding jig 8 and the work I2 thereon. The base I8, of the grinding wheel dresser rests upon the bed I5 and is freely movable in all horizontal directions. The dressing tool I9, which preferably is a diamond, is mounted on an arm 20 extending upwardly from the base I8 and is positioned in the same horizontal plane as the axis of the grinding wheel 6. A feeler 2| projects from the base I8 and has its point shaped the same as the point of the dressing tool I9 and located directly under it in a vertical plane. The feeler 2| is caused to traverse the face of the templet 22 during the dressing operation during which movement the base I8 is slid manually on the face of the bed I5.

The templet 22 has a shank 23 which is gripped in a clamp comprising a base 24 and a clamping bar 25 provided with screws 26. This clamp permits adjustment of the templet longitudinally of the work table 3 so that it may be properly aligned in the vertical plane of the periphery of the grinding wheel 6. The base 24 of the clamp is mounted for transverse adjustment on the bed I5. Its forward portion extends downwardly and overhangs the forward edge of the bed I5 in which is provided a T-slot 2l and bolts 28 having their heads 29 in said T-slot permitting movement of the clamp 24 transversely of the bed I5 and provide means for fixing the clamp in the desired position. An adjusting screw 30 is threaded into the base 24 of the clamp and has a head 3| in which is provided a groove to receive a guide 32 which is xed to the bed I5 by a bolt 33 having its head in the T-slot 21. Each side of the base 24 of the clamp is provided with a screw threaded opening to receive the adjusting screw 30 so that the adjusting screw and its guide 32 may be located on either the right or left hand side of the clamp as desired.V

Y Operation The machine is set up with the work holding jig 8 and the bed I5 of the grinding'wheel dresser rigidly attached to the reciprocating table 3 but inasmuchpstheclamping bolts B'fandIS forthe t jig and bed respectivelyb'oth act inthe T-slotl I0 in the table 3 the lateral positions of the jig and lbed are arbitrarily established and cannot be adl .l

justed relative to each other. The work I2 is4 clamped in the jig 8 and by conventional adjust; ing means (not shown) commonly provided ina grinding machine the grindingwheel is adjusted both vertically and laterally relativeto the vwork and, assuming that the periphery of the vgrinding wheel has been originally dressed to the proper V- shape the grinding operation is v-accor'nplished by reciprocating the bed 3 which carries the work j|2 theperiphery of the grinding wheel 6 the vtemplet Y may be adjusted by moving itsshank 23 longif Vtudinally in the clamp 24 or the longitudinal position of the work table 3 may be adjusted to accomplish the desired alinement of the templet. The lateral or transverse adjustment of the templet is obtained, with its clamping bolts 28 loosened, by' rotating the adjusting screw 3U and thereby `moving the clamp.y 2,4,transverse1y on the bedI 5 untilitis accuratelyepositioned whereupon it isiixed in A'place by tightening" theY screws 28. This transverse positioning of the templet 22 must be made relative to the work I2 which is located in the jig 8.

We claim:

Aj grinding wheel dresser comprising a horizontal `bed adaptedto be rigidly attached to the work .table of a grinding machine, a dressing tool freely slidable on the upper surface ofY said bed, a feeler Von said dressing tool, a member having a'part lying. over and against the upper surface of said bed at an edge portion thereof and a part extending downwardly alongside said edge, means for releasably securingtsaidfmember to said bed, a horizontal screw-threading into said member and having a connection withtheb'ed whereby v Yjecting portionat'the side-thereof -opposite its templet edge .engaged eby=-said clamp.v whereby uponrelease of the kclampthe templet may be adjusted in a direction at rightangles to the ad- Y justment of the member upon which it is mounted.

t HENRY W. KROPF.

,ARTHURy J. IBRICKNER. 

